Me
which of these genetic disorders will most likely inhibit active transport across cellular membranes?
select one:

a. hemophilia

b. cystic fibrosis

c. down syndrome

d. mitochondrial disease

The correct answer is b cystic fibrosis .

Explanation:

Cystic fibrosis is a genetic disorder.It occur due to mutation in a protein called cystic fibrosis trans membrane conductance regulator or simply CFTR.

   CFTR is a integral membrane protein that helps in the transport of chloride ions(Cl-).

   The production of sweat ,mucus occur due to the proper functioning of CFTR.If CFTR become nonfunctional due to mutation the secretion becomes thick and this thick secretion accumulate in lungs to cause respiratory tract infection.

 Beside lungs cystic fibrosis also affect other organs such as pancreas,kidney etc.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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answer by yourhope:

hi! : )

in which structure in the nucleus are ribosomes made?

b) nucleolus!

: )